By Topic

Magnitude approximation of IIR digital filters with constant group delay response

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Hegde, R. ; Coordinated Sci. Lab., Illinois Univ., Urbana, IL, USA ; Shenoi, B.A.

We present new techniques to approximate the magnitude response of IIR digital filters with nearly constant passband delay characteristics. A polynomial with a group delay response that approximates a constant value in the passband is chosen to be the denominator of the filter transfer function. The coefficients of the numerator polynomial are found such that the delay characteristic is unaffected, and the magnitude response either has desired degrees of flatness at ω=0 and/or ω=π or is flat in the passband and equiripple in the stopband. In the first case, the solution is shown to be analytical. In the second case, the well known Remez exchange algorithm is used to obtain the desired passband and stopband characteristics simultaneously

Published in:

Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on  (Volume:4 )

Date of Conference:

9-12 Jun 1997